Sanja Krstić

Optimization of Active Carbonaceous Material Obtained by Low Hydrothermal Carbonization of Plane Tree Seed with H3PO4

Activated carbons (ACs) were successfully prepared using plane tree seed (PTS) as a cheap and renewable raw material. The plane tree seeds were firstly treated combining magnetic (MM) and ultrasonic mixing (USM) during 0.5, 1 and 3 h in 1 M, 3 M and 6 M of H3PO4 solutions, and then activated at 260 °C during 20 h (low temperature hydrothermal carbonization–low HTC) in above mentioned solutions of the same molarity. The influence of combined mixing and activation processes on physical, structural and morphological properties, and their optimization was studied by X-ray powder diffraction (XRPD), Raman spectroscopy, nitrogen adsorption-desorption isotherms, fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analysis.

ADSORPCIJA METILENSKOG PLAVOG NA AKTIVNOM UGLJENIKU DOBIJENOM OD PLODA PLATANA

Plod platana je koriscen za dobijanje praskastog aktivnog uglja. Kao aktivirajuce sredstvo u pripremi je upotrebljena koncentrovana fosforna kiselina. Izvrsena je ravnotežna adsorpcija katjonske boje metilen plavo na sintetizovanom materijalu. Dobijeni rezultati su fitovani sa tri ravnotežna adsorpciona modela. Eksperimentalni rezultati su analizirani od strane Langmuir izoterme, Freundlich izoterme i Temkin izoterme. Najbolje slaganje eksperimentalnih rezultata sa teorijskim modelima je dobijeno u slucaju Langmuir-ovog ravnotežnog modela. Prema Langmuirovom modelu, postignut je najbolji adsorpcioni kapacitet boje na adsorbentu koji iznosi 354,60 mg g-1 kada je aktivan ugalj tretiran sa NaOH.